Hi Gary, if you use Windows' Reset feature, it typically asks you what to do with your data. Hopefully you told Windows to save your data? Assuming so, check whether you can find this temporary folder: C:\Windows.old If you find that folder: Set Windows to show hidden files and folders: https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5 Then explore that folder up to this point (if it exists): C:\Windows.old\Users\<username>\'''AppData\Roaming'''\Mozilla\Firefox\Profiles\ If you find recent data there, please pause and we can suggest how to resurrect your saved files.